Rotary pump.



g Patented May 12, 1903.

PATENT OFFICE.

`WILLIAM E. oOoK,'oF LONDON, ENGLAND;

yROTARYv PUMP.

SPECIFICATION forming part of Letters Patent No. 727,749, dated May 12, 1

yi'lginal applioatlonlled October .29.1 1901|,Serial No. 80,428- Divided and lthis application iiledlebruaryill 1902. Serial Y v No. 95,515. (No model.)

To all whom it mag/concern.' Y

Be itkno'wn that l," WILLIAM COOK, a

'subject of the King of Great Britain, residing at London, in the county of London, England,

. have invented `certain new and useful Improvements in Rotary Pumps; and I do here' by declare the following to bea full, clear, audexact description of the invention,such as WILenable others skilled in the art to which it appertains to make and use the same."

My invention relates to improvements in rotary pumps,`and more particularly to that class wherein are employed' nested drums.

It consists ofeccentrically-nested drums` mounted upon a suitable support, one of the drums being provided with vanes at various poin ts of its'periphery bridging the space between the drums, means for causing said vanes to so bridge said space without regard to the-relative positions of the drums, means for permitting the introduction of liquid between saiddrums, and means for permittingV ments of parts, as will be hereinafter fully de scribed andclaimed.

In theaccompanying drawings, Figure 1 represents a longitudinal vertical section taken centrally of a pump embodying the features of the present invention. Fig. 2-represents a transverse vertical section taken ou the plane of line 2 2 of Fig. 1.

The present inventionrelates to a form of rotary pumps as fully set forth and described in my application for patent filed October 29,

, able drum,as a, preferably rotatably mounted upon a fixed tube or pipe, as u., whichI pipe 1s formed with a partition, as fu: `A larger ldrum,as c', is adapted to inclose dlrum aand' to rotate centrally about a diierentaxis therefrom, being carried by suitable bearings c c; The drum a, it will be observed, is preterably mounted centrally upon its axis. rIlhe drum e is driven by abend and' pulley or other suitable mechanism, andthe two drums are linked together by the links h.. Each of said links his pivotally secured to drum a,

andthe links are preferably arranged at equidistant points of the drum on a circular line concentric withsaid drum. The other ends of links h are pivoted at equidistant pointsot`- It will thus be seen that.

each vane being mounted toy move laterally in its respective radial groove, as .8, in the wall of drum e, any'suitable springs, as t, normally pressing each .vane inwardly ifor bridging `the space between the drums a and e. When the drums rotate in the direction indicated bythe arrowin Fig. 2, as each of the vanes f leaves `the point of contact of the two drums the inner periphery of drum @and the outer periphery of drum a move apart,

and liquidl is thereby drawn intosaid space` through one end of the tube u in'A the direction indicated by the arrow at the rightdiand side of Fig. 1, tl1rough a port t in said tube, and through a suitable passage, as in drum a. As the'dru ms continue to rotate the port w is closed, and when the respective vane approaches the point of contact between'- the drums the aforesaid space'between the vanos4 and drums contracts, thereby forcing the duid through the passage y and a port e' into the opposite'end of tube u, from which it may he directed by the force of the drums to any desired point. v

Although I have illustrated three vanos provided with suitable corresponding pas- `sages and ports, yet it is obvious that the number of vanes, with their coperating passages and ports, may be Varied :ts-desired, and an y other slight alterations may be made within the spirit and scope ofthe invention.

Having now described lny invention, what I claim as new, and desire to secu re by Letters Patent, isy v l. In a rotary pump, the combination with suitable supports, of a tube fixed thereon, eccentrically-nested drums inclosing the same, links loosely locking said drums together, means for rotating the outer drum, passages leadingjfroln said tube to the-space between lsaid drums, and means dividing said space into sections, substantially as described.

2. In a rotary pump, the combination with asuitable support, of a tube thereon, eccentrically-nested drums inclosing said tube, communicating means beingr provided between said tube and the space between the drums, means dividing said space into conlpartments, and links having their-ends pivotally secured to the respective drums, each pivot-point being equidistant from the next preceding and succeeding one, such pivotpoints being arranged in a circular line con-l centric to the respective drum, substantially asdescribed.

'3. In a rotary pump, 'the combination with suitable supports, of a tube xed thereon, a partition dividing Ithe bore of said tube, the tube being formed with an intake-port near one end and an exhaust-port near the other, eccentrically -nested drums inclosing said tube, the outer drum being formed with longitudinal, radially-extending grooves, vanes mounted in said grooves, and means pressing said Vanes into contact with the outer pe# riphery of the inner drum, aplurality of tubular pass'agesbeing formed at each end -of the inner drum and extending i radially through the body thereof for permitting direct communicationbetween the respective ends of said tube with the space between said drums, substantially as described.

In testimony whereot l hereunto affix my signature in presence of two witnesses.

VILLIAM E. Witnesses: I

JOHN AULD,v R. A. HUToHoN. 

